<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .he{
            margin: 0 auto ;
            box-shadow: 0 0 100px 0 deeppink;

        }
        body{
            text-align: center;
        }
    </style>
</head>
<body>
<header style="background: red">header</header>
<section ><header class="he" >header</header></section>
</body>
</html>



